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A series of polyelectrolyte hydrogels were synthesized by copolymerization of N-isopropyl acrylamide with the ionic monomer sodium methacrylate. The swelling behavior and the effect of electric charge on the composition-induced collapse of the resulting ionic hydrogels were investigated in aqueous solutions of five single organic solvents (acetone, ethanol, acetic acid, butanol and methyl isobutyl...
Hydrogels are crosslinked macromolecules (polymer networks) with segments of hydrophilic groups. Such polymer networks are able to swell as well as to shrink in liquid phases. This paper reports experimental results for the swelling behavior of a nonionic, synthetic hydrogel of N-isopropyl acrylamide in partially miscible aqueous solutions of a single organic solvent (1-butanol and methyl isobutyl...
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